netVigilance Security Advisory 20

SonicBB version 1.0 XSS Attack Vulnerabilities

Description:
SonicBB is a user-friendly and fully customizable bulletin board package. SonicBB is compatible with any web server/operating system combo with PHP 4.x or higher installed.SonicBB is the ideal community software for all sites.

This vulnerabilities can be exploited only when PHP magic_quotes_gpc = Off.

External References:
Mitre CVE: CVE-2007-1903
NVD NIST: CVE-2007-1903
OSVDB: 34042
BUGTRAQ/BID: 23963


Summary:
SonicBB is a user-friendly and fully customizable bulletin board package. SonicBB is compatible with any web server/operating system combo with PHP 4.x or higher installed. SonicBB is the ideal community software for all sites.
Security problem in the product allows attackers conduct XSS attacks.

Release Date:
May 14 2007

Severity:
Risk: Medium

CVSS Metrics:
Access Vector: Remote
Access Complexity: High
Authentication: Not-required
Confidentiality Impact: Partial
Integrity Impact: Partial
Availability Impact: Partial
Impact Bias: Normal
CVSS Base Score: 5.6

Target Distribution on Internet: Low

Exploitability: Functional Exploit
Remediation Level: Workaround
Report Confidence: Confirmed

Vulnerability Impact: Attack
Host Impact: XSS Attack.

SecureScout Testcase ID:
TC 17944

Vulnerable Systems:
SonicBB version 1.0

Vulnerability Type:
XSS (Cross-Site Scripting) to force a web-site to display malicious contents to the target, by sending a specially crafted request to the web-site. The vulnerable web-site is not the target of attack but is used as a tool for the hacker in the attack of the victim.

Vendor:
iScripts

Vendor Status:
Contact with the Vendor was established and draft of the security advisory was provided on 10 April 2007, the vendor promised to fix the issue but stopped responding to our emails on 10 April 2007. There is no official fix at the release of this Security Advisory

Workaround:
Modify in the php.ini file following line: magic_quotes_gpc = Off.

Example:

REQUEST:
http://[TARGET]/[PRODUCT-DIRECTORY]/search.php?query=1&part=post`<> '' UNION SELECT `id`,'<script>alert(document.cookie)</script>',1,1,1,1,`username` FROM `users` WHERE id=1%23

REPLY:
Will execute <script>alert(document.cookie)</script>